enter code here
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.newuser.applicationtwo">
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:roundIcon="@mipmap/ic_launcher_round"
android:screenOrientation="landscape"
android:supportsRtl="true"
>
<activity
android:name=".MainActivity"
android:screenOrientation="landscape"
android:theme="@style/AppTheme"
android:label="@string/app_name">
</activity>
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</application>
<activity android:name=".SecondActivity" />
<activity android:name=".ThirdActivity" />
<activity android:name=".FourthActivity" />
<activity android:name=".FifthActivity" />
<activity android:name=".SixthActivity" />
</manifest>
-----------------------------------------------------------------------
package com.example.newuser.applicationtwo;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.util.Log;
import android.view.View;
import android.widget.ImageButton;
import static android.content.ContentValues.TAG;
public class MainActivity extends Activity implements View.OnClickListener
{
private ImageButton playBtn, multiplayerBtn, settingsBtn;
public MainActivity(ImageButton playBtn, ImageButton multiplayerBtn) {
this.playBtn = playBtn;
this.multiplayerBtn = multiplayerBtn;
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.playBtn:
Intent i = new Intent(getApplicationContext(),
SecondActivity.class);
startActivity(i);
onClick(playBtn);
Log.d(TAG, "Play Button Move");
break;
case R.id.TopicBtn8:
Intent j = new Intent(getApplicationContext(),
ThirdActivity.class);
startActivity(j);
onClick(multiplayerBtn);
Log.d(TAG, "Multiplayer Button Move");
break;
case R.id.settingsBtn:
Intent k = new Intent(getApplicationContext(),
SixthActivity.class);
startActivity(k);
onClick(settingsBtn);
Log.d(TAG, "Settings Button Move");
break;
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
playBtn = (ImageButton) findViewById(R.id.playBtn);
multiplayerBtn = (ImageButton) findViewById(R.id.multiplayerBtn);
settingsBtn = (ImageButton) findViewById(R.id.settingsBtn);
playBtn.setOnClickListener(MainActivity.this);
multiplayerBtn.setOnClickListener(MainActivity.this);
settingsBtn.setOnClickListener(MainActivity.this);
------------------------------------------------------------------------
package com.example.newuser.applicationtwo;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import static android.content.ContentValues.TAG;
class SecondActivity extends AppCompatActivity implements
View.OnClickListener {
private Button topic1Btn, topic2Btn, topic3Btn, topic4Btn, topic5Btn,
topic6Btn, topic7Btn, topic8Btn;
public SecondActivity(Button topic1Btn, Button topic2Btn, Button topic3Btn,
Button topic4Btn,
Button topic5Btn, Button topic6Btn, Button topic7Btn,
Button topic8Btn) {
this.topic1Btn = topic1Btn;
this.topic2Btn = topic2Btn;
this.topic3Btn = topic3Btn;
this.topic4Btn = topic4Btn;
this.topic5Btn = topic5Btn;
this.topic6Btn = topic6Btn;
this.topic7Btn = topic7Btn;
this.topic8Btn = topic8Btn;
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.topic1Btn:
Intent i = new Intent(getApplicationContext(),
SixthActivity.class);
startActivity(i);
onClick(topic1Btn);
Log.d(TAG, "Topic 1 Button Clicked");
break;
case R.id.topic2Btn:
Intent j = new Intent(getApplicationContext(),
SixthActivity.class);
startActivity(j);
onClick(topic2Btn);
Log.d(TAG, "Topic 2 Button Clicked");
break;
case R.id.topic3Btn:
Intent k = new Intent(getApplicationContext(),
SixthActivity.class);
startActivity(k);
onClick(topic3Btn);
Log.d(TAG, "Topic 3 Button Move");
break;
case R.id.topic4Btn:
Intent l = new Intent(getApplicationContext(),
SixthActivity.class);
startActivity(l);
onClick(topic4Btn);
Log.d(TAG, "Topic 4 Button Move");
break;
case R.id.topic5Btn:
Intent m = new Intent(getApplicationContext(),
SixthActivity.class);
startActivity(m);
onClick(topic5Btn);
Log.d(TAG, "Topic 5 Button Clicked");
break;
case R.id.topic6Btn:
Intent n = new Intent(getApplicationContext(),
SixthActivity.class);
startActivity(n);
onClick(topic6Btn);
Log.d(TAG, "Topic 6 Button Clicked");
break;
case R.id.topic7Btn:
Intent o = new Intent(getApplicationContext(),
SixthActivity.class);
startActivity(o);
onClick(topic7Btn);
Log.d(TAG, "Topic 7 Button Move");
break;
case R.id.topic8Btn:
Intent p = new Intent(getApplicationContext(),
SixthActivity.class);
startActivity(p);
onClick(topic8Btn);
Log.d(TAG, "Topic 8 Button Move");
break;
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_second);
topic1Btn = (Button) findViewById(R.id.topic1Btn);
topic2Btn = (Button) findViewById(R.id.topic2Btn);
topic3Btn = (Button) findViewById(R.id.topic3Btn);
topic4Btn = (Button) findViewById(R.id.topic4Btn);
topic5Btn = (Button) findViewById(R.id.topic5Btn);
topic6Btn = (Button) findViewById(R.id.topic6Btn);
topic7Btn = (Button) findViewById(R.id.topic7Btn);
topic8Btn = (Button) findViewById(R.id.topic8Btn);
topic1Btn.setOnClickListener(SecondActivity.this);
topic2Btn.setOnClickListener(SecondActivity.this);
topic3Btn.setOnClickListener(SecondActivity.this);
topic4Btn.setOnClickListener(SecondActivity.this);
topic5Btn.setOnClickListener(SecondActivity.this);
topic6Btn.setOnClickListener(SecondActivity.this);
topic7Btn.setOnClickListener(SecondActivity.this);
topic8Btn.setOnClickListener(SecondActivity.this);
Intent intent = new Intent(getApplicationContext(),
SixthActivity.class);
startActivity(intent);
}
}
----------------------------------------------------
我想知道是否有人可以提供帮助？我正在尝试构建测验应用程序，而我
清单文件中的主要活动有问题。它似乎
要求构造函数，当我运行代码时，它告诉我
following：运行SecondActivity时出错：活动“ SecondActivity”为
未在AndroidManifest.xml中声明。不确定如何将其更改为
不幸的是MainActivity或为SecondActivity添加的其他内容
通过阅读有关MainActivity的类似问题，我无法解决它。
我附加清单文件以及MainActivity和SecondActivity
最佳答案
移动
</application>*
就在之前
</manifest>
因为现在只有第一个活动在范围内
关于java - 主要 Activity 要求构造函数-第二个 Activity 不在 list 文件中，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/44605930/